science-help

[thorny gyro]

Doubt in chemistry both the questions are related to each other:

[peak geyser]

questions is incomplete

send part a as well

oo

o

ok nvm

[thorny gyro]

part a is sent as followed the previous

[peak geyser]

my bad

[thin pendant]

isn't the name of this structure's molecular geometry ''pyramid''

[short ocean]

i understand that as the diameter of the connecting wires decreased, (that means the area of cross section will decrease) and area of cross section will decrease, the total resistance will increase because they are indirectly proportional however as the resistance will increase the current will decrease. as, on the basis of ohm's law current is indirectly proportional to resistance

[cunning ore]

no its T shape

can anyone help

[short ocean]

d

no no c

as

[cunning ore]

more H mols?

[short ocean]

no wait i guess its wrong

a is acidic

b is basic

[blissful parcel]

Hydrolysis of salts will produce acid and bases respectively , In b naoh (strong base) +h2co3 (weak acid ) will be produced so Ph should be high

[grim matrix]

that would be 1 doublet

theres 2

so T shape

[short ocean]

i guess b or d

[blissful parcel]

d will produce H2so4 and Naoh

[short ocean]

its b

[blissful parcel]

Answer should be B , I think

[short ocean]

because hco3 is a weak acid and its combining with naoh which is a strong base

that means it will form a basic salt

[thin pendant]

ohh yesss i got it now

sorry

[short ocean]

and basic salts have higher ph value

[cunning ore]

wait how do u know what's produced

[blissful parcel]

Ionise it

Co32- and na+

[short ocean]

yes like that

[blissful parcel]

Water will hydrolyse , H2CO3 AND NaOH

[cunning ore]

ohh ok ty

[cunning ore]

whats H2SO4, is it also a weak acid

[short ocean]

its a strong acid

[blissful parcel]

Power = I²R , so if current Is increased then power will also increase , meaning the filament wire will heat more or lamp will burn brighter

[short ocean]

and it will form common salt

[cunning ore]

oh so strong acid + strong base in solution? implies lower pH

[short ocean]

no no it implies that the ph will be balanced

[blissful parcel]

No close to neutral

[short ocean]

yes

[blissful parcel]

Yeah yeah , what ishika is saying it's right

[cunning ore]

ohh ok i was saying lower than the NaOH and H2CO3

got it, thx guys

[blissful parcel]

No. Common salt is NaCl not Na2CO3

[short ocean]

sorryy my bad i read it wrong

[blissful parcel]

Np

[thorny gyro]

How to learn the light chapter in physics?
Its really tough as there are about 30 Ray diagrams

Ping me if one of you answer:)

[short ocean]

its not tough as you think

you just need to practice those ray diagrams frequently and when you will do so, you will see a pattern in them and you will be able to make them on your own without looking at the book

@thorny gyro

[thorny gyro]

ohk
i have a test on it in 3 days
so i dont have much time to practice it

Thanks tho

[blissful parcel]

Just remember the rules of lens , mirrors

And I don't think you will need to remember ray diagrams anymore ( at least in HS level optics)

@thorny gyro

[halcyon zephyr]

When the current of circuit increase, why the filament wire’s resistance will decrease? It says in the mark scheme that the filament wire’s resistance will decrease but i’m not sure of why🤔

[halcyon zephyr]

So when it heats more, the resistance of it will decrease, is it right?

[supple depot]

b

[willow lion]

For naming of compounds you use prefixes for covalently bonded molecules right?

i.e SCl2 = sulfur DIoxide

[thorny gyro]

It's just refraction at plane mirrors
No lenses mirrors and all
I'm in 10th grade

[willow lion]

is that used anywhere else?

[blissful parcel]

cacl2 = calcium chloride

It's not bonded by covalent bond

[short ocean]

its no biggie you should try to make the diagrams atleast twice and be sure to learn their position, nature and where they are formed and their size

[short ocean]

i learnt it at the last moment too but it worked for me just dont hassle it

[thorny gyro]

Ohk thanks

[thorny gyro]

What do you do rn ?

Your an Indian I suppose

[short ocean]

nothing tbh exams got cancelled

[short ocean]

yeah

[willow lion]

You an ib student?

[thorny gyro]

10th 2021 batch ?

[short ocean]

no 2020 one

[thorny gyro]

2020-2021 right?

[blissful parcel]

Nais nais

[short ocean]

yaes

[blissful parcel]

Indians

[thorny gyro]

Then u r 2021 batch lol
As ur give ur exams in 2021
Cbse or icse?

[blissful parcel]

Reflection at plane mirror is easy , just remember laws of reflection and nothing else

[short ocean]

i was contemplating on the fact that whether i should start studying for 11th or no but i dont really want to study rn hehe

[blissful parcel]

And for refraction , just remember laws of refraction

[short ocean]

they are interesting

[short ocean]

cbse

[thorny gyro]

Lol you should
What are you taking in 11th ?

[thorny gyro]

Thanks :)

[short ocean]

science obvi

[thorny gyro]

Ohk

[thorny gyro]

How is it obvious lol

[short ocean]

i dont want to :' (

[thorny gyro]

Medical field ?

[short ocean]

because im in the science help section

[thorny gyro]

Take a break for a few days

[short ocean]

right

[thorny gyro]

Oh yeah true lol

[thorny gyro]

Neet ?

[short ocean]

yeas

[thorny gyro]

Ohhh

Okie

I'm a neet aspirant too

[short ocean]

ayy cool

[blissful parcel]

And for the resistance part

Resistance increases with temperature ;-;

Generally , until and unless it's semiconductor

[thorny gyro]

What do you mean by refractive index ?

@blissful parcel

[blissful parcel]

Generally the ratio of how much speed has changed

In comparison to vaccum

Refraction occurs due to change in speed of light

Denser medium = less speed , rarer = more speed

[blissful parcel]

So refractive index = speed of light in vaccum / speed of light in that medium

@thorny gyro

[thorny gyro]

Ohk

But if they ask the definition what do i write ?

Nvm

Lol

[blissful parcel]

Uhhhhhhhhh

Property of medium ?

Idk what exact definition would school accept

[short ocean]

there are two cases in it in the second case, if the potencial difference will decrease, the resistance will also decrease as they are directly proportional. you may ask why potencial difference is decreasing thats because as i told before, the current is decreasing so the p.d will also decrease AND due to the decrease of p.d the resistance will decrease (as they are directly proportional)

@halcyon zephyr

[blissful parcel]

No

Potential diff will be same as cell is not changed

[thorny gyro]

I didn't understand this

[blissful parcel]

Resistance and current will change

[blissful parcel]

Snell's law

X1 sin I =X2 sinr

sin(I)/sin(r)= X2/X1

[thorny gyro]

We didnt learn all that lol

What do u mean by sin I and r ?

[blissful parcel]

Law of refraction?

[thorny gyro]

What's x2 and 1

Yes

We did that

[blissful parcel]

I= angle of incidence

[blissful parcel]

Same with R(angle of refraction) , normal notation ,x1= refractive index of medium 1 , and same with X2

Yeah second law

It's written there

[thorny gyro]

What's sin r ?

[short ocean]

dude thats in lenses you said only mirrors are coming

prepare for mirrors first

[thorny gyro]

It's in plane surfaces

[blissful parcel]

sin of angle of refraction

[thorny gyro]

The first chap in light

[blissful parcel]

sine = trigonometric ratio

[thorny gyro]

So sin I/sin r= refractive index of second medium with respect to first medium

[blissful parcel]

Yes

[thorny gyro]

Okay

Thanks alot

Byeee

[quartz adder]

icse

[thorny gyro]

Yes

whats wavelength have to do with anything in light?

[thorny gyro]

Well

[viral sorrel]

light is just an electromagnetic wave, but it has a specific wavelenght that allows us to see it

have you studied elctromagnetic waves?

[thorny gyro]

nope

[viral sorrel]

do you know what wavelenght is?

[thorny gyro]

yes

[viral sorrel]

ok good, essentially wavelenght is just something that defines a wave, it may change, depending on the source, so since light can be described as a wave, its wavelenght tells us something about it

[hearty dome]

hahaha i remember studying this from school. Okay so lets say that you have two mediums. mdm 1 is water and medium 2 is air. so which is optically denser? obviously its medium one which is water. so a ray of light, moving from mdm 1 to mdm 2 will undergo refraction. That much you know right? would it bend towards the normal or away from the normal? mdm 2 is optically rarer so its speed will increase and hence it is refracted away from the normal. the angle formed between the refracted ray and the normal is angle r and the angle between the normal and the incident ray is angle i. so according to laws of ray optics, the ratio between the sin i to sin r would be a constant. in simpler words, sin i/sinr = c where c is any constant

[viral sorrel]

for example the color that we can see

[hearty dome]

hope this helps hehehehe

[thorny gyro]

fermat's principle

[thorny gyro]

omg this was such a good explanation tysm

[thorny gyro]

okay thanks!

[hearty dome]

no lol its because i knew what you were expecting

i also did icse uto tenth grade

[viral sorrel]

np

[dusk tree]

Can anyone help me with a question about fluid mechanics?

[mighty vector]

sure

[dusk tree]

Can i dm you?

[mighty vector]

ok

[west widget]

i need help with this homeowrk

please

[viral sorrel]

ok, what are you struggling with?

[west widget]

i do understand either of them but especially the second one

the spring problem

i asked the teacher for help and he didnt do much

[viral sorrel]

are you familiar with the concept of energy conservation?

[west widget]

Ki+Ui=Kf+Uf?

[viral sorrel]

yep

that

so in the first problem, in a) you have to calculate the gravitational potential energy, do you know how to do that?

[west widget]

gravity x mass x change in height

[viral sorrel]

perfect, we know that on top of the hill at the start, the coaster is not moving so the total energy would be?

[west widget]

0

[viral sorrel]

total energy is E=Ki+Ui, if Ki=0 cuz it's still and Ui=mgh, what's the total energy?

@west widget

[west widget]

one second

[viral sorrel]

sure

you don't need to give me the value

just the formula

[west widget]

525 x 9.8 x 86?

[viral sorrel]

yep

correct

so, we know that that value will always be the total energy

[west widget]

yes

[viral sorrel]

goung to point b) E=Uc+Kc, we know E, what do we know about Uc or Kc?

[west widget]

...

i have no clue

[viral sorrel]

ok, about Kc we know nothing yet

but Uc=0, right?

because Uc=mgh

and h=0

[west widget]

oh

yes

so e= kc?

[viral sorrel]

yep

so now we can easily find v

[west widget]

how

[viral sorrel]

wha's the formula for Kc?

1/2 m v^2

[west widget]

but we dont have the velocity

[viral sorrel]

yes, we have to find that

we have everything else

E=1/2 m v^2

[west widget]

would it be mass x kinetic energy

[viral sorrel]

so how much is v?

[west widget]

525 x 442470 J

[viral sorrel]

the formula

[west widget]

mass x kinetic energy

no

wait

sqrt kinetic energy/0.5 mass

[viral sorrel]

not kinetic energy but total energy

sqrt(2 E/m)

[west widget]

ok

and e is 525 x 9.8 x 86

from before

[viral sorrel]

yes

correct

so in point c) E=Ua+Ka, what do we know about this

[west widget]

so next is the velocity when the car has gone half way up the loop

[viral sorrel]

yep

[west widget]

is Ua 525 x 9.8 x 22

is its height 22

because the radius of the circle is 22 meters

[viral sorrel]

well A isn't placed at radius height

but at diameter height

so double that

[west widget]

Ua 525 x 9.8 x 44

[viral sorrel]

perfect

we know E

and we have to find v again

now it's a little more complicated for the actual value, but since you've understood the concept, it's kinda simple

poimt d) is pretty much the same thing but at radius height

[west widget]

so since E= 1/2 mv^2 would we just solve that equation for v?

[viral sorrel]

wait

now E isn't =1/2 mv^2 anymore

it's E=1/2 mv^2 +Ua

[west widget]

why

[viral sorrel]

cuz Ua isn't 0

[west widget]

oh becaus

yeah

i was about to say that

ok

[viral sorrel]

perfect

now you just have to find v, it's quite easy

[west widget]

and then d i do the same thing but replacing the values with radius height instead of diameter

[viral sorrel]

for d) yes

[west widget]

ok

[viral sorrel]

moving to point e)

why would the car fall?

[west widget]

because it doesnt have a high enough speed to counteract the pull of gravity

idk

[viral sorrel]

well kinda, essentialy the car falls when it stops, right?

[west widget]

yes

[viral sorrel]

so when v=0

is v in point A =0?

it's the solution of point c)

[west widget]

if thats true wouldnt rt

i was about to ask that

ok

thank you

[viral sorrel]

so does the car fall?

[west widget]

i think

wait

one minute

[viral sorrel]

was v=0 in point c)?

[west widget]

no

it is safe

[viral sorrel]

so does the car stop?

yep

it doesn't fall

[west widget]

yes

can you help with the second set because i have no clue what to do with them

my professor didnt help

[viral sorrel]

now i have to go, but the 2nd problem is very similar, just know that for springs U=1/2 kx^2 where k is the constant of the spring (given by the problem) and x is how much the spring is contrapted or elongated

the concept is basically the same

use the conservation of energy

[west widget]

ok

this is not going to go well

[somber mural]

Has anyone got a big page of all the physics formulas?

[viral sorrel]

there are quite a lot lol

[somber mural]

Like for kinematics/Newton’s/fluids

[viral sorrel]

ok hint for the 2nd problem if no one else helps you: E=Uspring+Ugravity+K, in this configuration the spring is to be considered in vertical position and you put the mass on top of it

[viral sorrel]

@west widget

Can't help you reason with the problems so here you go

[west widget]

thank you so much

this is what happened with the teacher

https://cdn.discordapp.com/attachments/789909646294515722/839901415979876422/unknown.png

he is not useful at all

i chatted him three times in 2 hours and i watched him open the messages and ignore them

@viral sorrel

[viral sorrel]

lol

[cold otter]

I know they are less reactive but I forget why, would anyone be able to help?

[blissful parcel]

ns1 and ns2

ns2 is stable

ns1 is not stable as much as full filled orbital

@cold otter

[cold otter]

Oh yeah perfect thank you sm

[blissful parcel]

Yw

[small nexus]

by any chance could someone help me w understanding photosynthesis (4 stages) and cellular respiration (aerobic specifically - krebs/citric acid + etc & atp synthase)? im not sure why im having so much trouble wrapping my head around both of these concepts ^^

[pale bison]

I can try if you want but I'm not sure to be useful at all

do you have some notes so I can see what you need to know?

[small nexus]

yeah i can send you my notes in dms in a moment! i really appreciate it!!

[pale bison]

perfect

[pale bison]

I sent to you a friend request because I don't think we can chat rn

[small nexus]

okay! sorry for making you wait so long

[eternal hound]

Does anyone have a good way of memorizing physical formulas?

[thorny gyro]

Does anyone have experience in Keysight ADS ? It's a simulating tool

[thorny gyro]

I would try flashcards. Preferably physical ones

[eternal hound]

ok I'll try that, thanks

[thorny gyro]

You're welcome! Anki is a great digital tool

[slim oracle]

cram also very good for flashcards, you can make games of it

https://shopeesgblog.com/wp-content/uploads/2018/05/cram.com-Flashcards.png

[eternal hound]

ok thanks for all of your good advice

[thorny gyro]

Is an agricultural science major good

[candid citrus]

anyone taking the DAT here

[azure sleet]

anyone know chemistry Kinetic ?

[hearty dome]

the rate of reactions and stuff?

i can try

[azure sleet]

yeah bro

it makes my head crazy

[thorny gyro]

nope most of the people see them as farmers I cant stand the attidue towards it but its not great by itself too I would recommend biology more

[cunning ore]

if molarity is decreased for galvanic cell both sides how is cell potential affected

[hearty dome]

haha yess, we had to deal with a few concepts related to it so ig i can try if you have doubts

[lofty dragon]

most of the agriculture science majors call themselves farmers lol

[thorny gyro]

kshsjabshs

[azure sleet]

thanks but i've done it. i appreciate it dude ;).

[thorny gyro]

Anyone here Animation artist
I need help in film making and I could pay for it

Dm me

[pale bison]

#art-help

I think they could help

[balmy harbor]

a

[tranquil notch]

What are the signs for ΔS and ΔH? When ethanol boils?

[rapid epoch]

Del S stands for change in entropy and del H stands for change in enthalpy

[tranquil notch]

Thanks

[dusty dagger]

Aren't you asking for the signs of changes of these parameters

I think del H would be positive as boiling is an exothermic rxn. i.e. heat is released

Also del H is the enthalpy of vaporization

Talking about del S it will also be positive since del S is a measure of randomness and as you boil the ethanol it's molecules will move faster and faster and be more and more random

I might be wrong

But i guess this is what you were looking for

[rapid epoch]

Yeah that's👍

[severe idol]

hey anyone familiar with lac operon

[frigid blade]

Yes, a little 😄 do you need something specific?

[severe idol]

well ik all the repressor and binder stuff

you know anything about structural genes z,y and a. why do they even exist

[frigid blade]

Basically lacZ encodes the ß-Galactosidase which is the main hydrolyzing enzyme. The lacY encodes a transportprotein which allows the transport of the ß-galactosides into the cells. The lacA encodes a β-galactoside transacetylase.

Apperantly it is not quite known why lacA is necessairy for the function of the operon 🙂

and I think lacZ of course to cleave ß-galactosides and the transportprotein should also be clear

[azure wraith]

heyy i've got a bit of high school chem questions, when doing free radical substitution must the state for the halogen be in gas?

[severe idol]

thanks a lot :)

[azure wraith]

or can it be liquid as well

[paper roost]

Should be in gas. Homolytic fission can occur only then

[blissful parcel]

Homolytic fission can occur in non polar solvent too

But generally it is in gas phase

[willow lion]

Is oxidation states in roman numerals always positive? i.e (I) = +1 or (II) = +2

[grim matrix]

it is not

but usually you put the + and -with the roman numerals

+II -II

and actually its I+ II-

unless you mean in nomenclature

then its positive cuz of the compound

you don't write the negative one

[willow lion]

I meant stuff like Copper (II) Oxide

and similar ones

[lofty dragon]

yeah in metal ions it is positive

[willow lion]

I see thank you guys

[sweet vapor]

heyy, can pure PbSO4 exist as a solution?

[grim matrix]

ye nomenclature

but its not positve cuz "its always positive"

you just need to understand that the compound you write the oxidation state of is positive

[grim matrix]

uhhh

if its pure its not a solution

i don't understand the question tbh

if you mean if you can use it as a solvent? not really its crystal form

and if you mean if its soluble in water

it is also not

not that well at least

[sweet vapor]

Ohhh okay, thanks. That was what i was looking for. My bad for not phrasing my question better 😄

[grim matrix]

no thats okay haha

did you mean soluble in water?

[willow lion]

Ionic/polar stuff is soluble in water

[grim matrix]

uhh

[willow lion]

right?

[grim matrix]

it depends on much more thn that

[thorny gyro]

well not all ionic stuff

[grim matrix]

but for high school science yes

haha

[blissful parcel]

Lattice energy and hydration energy is the main factor

[thorny gyro]

ye

[grim matrix]

well

no

but

i don't think you need to know alrready in high school

theres just a couple of factors basically

wait yes

ur right but that doesn't really mean yu can't already know if somthn soluble in water or not

[blissful parcel]

We are taught about those two in HS (11th grade basically)

We get general trend only

[grim matrix]

yes

[blissful parcel]

To know , you have to know the values , and that's hard , but after studying chem for longer period of time , we can get general idea which is soluble or not

[thorny gyro]

entropy , lattice energy ,hydration energy afaik

[grim matrix]

the values?

[blissful parcel]

Energy values

[grim matrix]

theres stuff like common ion effect

that is somethn that changes the solubility too

[grim matrix]

ohno

why would you ever learn those

[thorny gyro]

ofc

[grim matrix]

this gives me the same energy as "learn the whole periodic table"

[blissful parcel]

Well I was only taking about solution of only one electrolyte ;-;

[grim matrix]

theres no use haha

its made to be used

[thorny gyro]

The solubility product is a constant value.

[grim matrix]

but basically you don't need to know values to be able to know if it will be soluble in water

you can estimate it 🙂

[blissful parcel]

Aah am saying that we don't know if we get any unknown compound and asked if it is soluble or not , until and unless we know energy values , or just put It in water ;-;

[grim matrix]

uhh

well

no 🙂

[blissful parcel]

Ohhh

[grim matrix]

I think you can estimate it

[blissful parcel]

Like how?

[grim matrix]

don't ask me how tho

i can't remember jskfgh

[blissful parcel]

Ohhhh

[sweet vapor]

Yeahh, I wanted to know because I had a practical exam today and we were tasked to find out what cation and anion was present in Solution Y. I managed to find out that there were sulfate anions by adding barium nitrate, but i struggled with identifying the cation, as it formed a white precipitate that was soluble in excess when aq NaOH was added, and formed a white precipitate that was insoluble in excess when aq ammonia was added. Because of that I thought that lead (II) ions were present, but on hindsight, it wouldnt make sense as Y was a solution. I probably screwed up then.

[grim matrix]

it wasn't that important to know cuz you can always just calculate it

[blissful parcel]

Uhhh am talking from the point of lattice energy and solvation energy , other methods like solubility product ,etc can be used too

[grim matrix]

hm ye

There is a new rule (rule number 5), please read it before using the help channels! #welcome-verification

[willow lion]

I was told that I was doing my combustion empirical questions wrong

since my method is different

can anyone confirm this?

This is what I did

but then apparently it was done incorrectly

[rapid epoch]

I had some questions regarding D block elements can anyone help me ?

[grim matrix]

i quickly looked at it and it seems to be ok

i could be skipping some stuff tho

[grim matrix]

ok ill do one more haha

shoot

[willow lion]

As long as its ok then Im happy

Thank you

[grim matrix]

i mean

if you do it like this and its all right

i think ur method works haha

[rapid epoch]

So like how does hydration enthalpy come into play

Like how does hydration enthalpy decide the oxidation state of the compound

[willow lion]

cuz I was talking with another student and they said they did it differently, thank you for clearing it up

[grim matrix]

i have no idea sorry haha

[rapid epoch]

Ahh well it's alright 👍

[grim matrix]

i found this

https://chemistry.stackexchange.com/questions/124766/what-is-the-role-of-hydration-enthalpy-in-oxidation

[rapid epoch]

I'll check it up for sure thanks 🙏

[azure wraith]

what happens if you perform oxidative cleavage on this?

i know you're supposed to get a ketone and carboxylic acid but im not sure how to draw it

am i correct?

[thorny gyro]

well not elemental O

[blissful parcel]

I do have the mechanism but idk if you will be able to understand my handwriting

Sometimes I have trouble myself reading it xD

[thorny gyro]

This will be helpful

[azure wraith]

oh shit haha i think thats way more advance

im still high school

[thorny gyro]

me too.

It is not that advanced tho

[azure wraith]

what's DMS?

[thorny gyro]

a reducing agent afaik

ignore the first picture

[azure wraith]

oh i understand now

thank you!

[thorny gyro]

np

[rugged apex]

hey i had a doubt , if it is in dynamic equilibrium , then will the dissolved compound come out and become undissolved

[brittle saddle]

You mean if it constantly changes from dissolved to undissolved and back from undissolved to dissolved? Or what do you mean?

[rugged apex]

yep thats what i wanted to verify..

[brittle saddle]

Yes, that what dynamic euqlibrium means. The net amount of undissolved and dissolved molecules stays the same tho

[rugged apex]

okay thanks

could anyone explain, what is metastable equilibrium

[lean kraken]

metastable state may be changing, but too slowly to be observed

[willow lion]

How would you find the number of oxygen atoms in 3Al2(CO3)3? Is it the subscript first so O3*3 then multiply that by the 3 coefficient?

[lean kraken]

The oxygen atom is 3 multiplied by 3

[rugged apex]

first, there are three oxygen atoms in carbonate ion , and there are three carbonate ions so 3x3 is 9

[willow lion]

You ignore the coeffcient then?

[rugged apex]

well no ahh i forgot so there will be three alumuinum carbonate ions too so 3x3x3=27

[brittle saddle]

No you dont its 3 x 3 x 3

[rugged apex]

sorry

[willow lion]

Oh thanks guys

[willow lion]

Its ok man thanks for helping ❤️

[lean kraken]

Oh yea i also forgot the other 3 , sorry

[rugged apex]

i will try..

[lean kraken]

Yes

[rugged apex]

well these are out of my course i cant help

[willow lion]

Na3[Ag(S2O3)2]

what does the square brackets mean?

isn't it the same as Na3Ag(S2O3)2?

[heady pivot]

I believe that is the point value, if you're talking about the most recent picture

[verbal flume]

hello, i'm new here do you guys know which channel teach organic chemistry. I have a test next week and now I don't know how to do exercise with reaction things :<

[vestal grove]

anybody who's good at molecular biology?

i need help whit a genetic tree

please

[pseudo moat]

like a pedigree?

[vestal grove]

yesssss exactly

[unborn bluff]

Is AP Biology hard?

I heard its hard but just not sure how hard and what to expect

[sleek steppe]

For people who took chemistry 2 and organic chemistry 2, did you have to memorize the periodic table?

[azure wraith]

you can ask here:) its science

[azure wraith]

No you don't need to memorise it, its given in exams

but memorising common elements might help save a bit of time

i wouldnt advice you to spend time memorising it, you'd eventually remember them (somewhat) after practicing a bit

[sleek steppe]

👍🏻

[cunning ore]

It involves a lot of memorization and textbook reading

So if you’re good with that then ur fine I guess

[willow lion]

^

[pseudo moat]

i can try, whats your question?

[thorny gyro]

@thorny gyro I can solve it

[vestal grove]

I do not understand very well how to do a mitochondrial pedigree, which is where the mitDNA mutation occurs.

[dense lantern]

does someone have a good book for brain's anatomy

[pseudo moat]

so its been a few years since my college degree lol but mtDNA tranmission is much easier than normal. Being that the offspring comes from the female, the mitochondrial DNA is transmitted ONLY from female to offspring. So if a mom has an mtDNA mutation, ALL of her kids will have it, regardless of gender. HOWEVER, if her kids are a mixture of males and females, only her female offspring can pass it onto their offspring. Affected males with a mutated mtDNA will NEVER pass it onto their offspring...make sense?

unlike normal gene transmission, there is no "coming together" of alleles from maternal and paternal. This is a physical "passing on" that occurs. Because the egg carries maternal mitochondria, the offspring that the egg becomes contains maternal mitochondria - nothing is "donated" by the sperm when it comes to mtDNA

Notice how in the attached pedigree, affected females (circles) affect ALL of their offspring, but affected males )squares) do NOT pass this on

and since there is only 1 allele when it comes to mtDNA, there are no 'carriers' or heterogeneous. U either have it or u dont.

Hope this helps!! Good luck!!

[vestal grove]

damnnn, thank you so much, it's easier than i had thought! :)))

[thorny gyro]

An ideal solution is prepared by mixing 1.0 mol of methanol, CH3OH, and 1.0 mol of propanol, CH3CH2CH2OH. What is the composition of the vapor
in equilibrium with this solution at 400C? At 400C, the vapor pressures of pure methanol and pure propanol are 40.4 kPa and 5.95 kPa, respectively.
Can anyone help me?

[frigid blade]

I love how our prof used the same graph, genetics is amazing 😁

[shrewd musk]

is this of the chapter human genetics or sum??

of the topic pedigree analysis

[pseudo moat]

i just googled-imaged it so i can show an example. no idea where its from lol

[shrewd musk]

xD its alr, its kinda similar to my hs bio book so yh 😁

[prime junco]

I’ll try to give you a “ molecular biology approach “. [I am not 100% about what I am going to said, but its the only reason I know. So, if anyone can confirm it, maybe @pseudo moat (?)]
The ubiquitination of the male mitochondria (more specifically the prohibitin ubiquitination, which occurs during spermatogenesis) is the reason for the sperm mitochondria degradation. While the sperm will decondensed -in the female cyto- the ubiquitin- the proteasome dependent proteolytic complex will target this specific inner mitochondrial membrane protein (prohibitin). After that, only female mitochondria remains. This happen before the 3rd cleavage
There are few speculated reasons for this phagein, the most commonly accepted is that mitochondria spermatozoa are more likely to have mutations because male produce way more spermatozoa than female produce ocyte.
I apologize for my english.

[pseudo moat]

that sounds very familiar, and the english is good, i finished a molecular cell physiology degree 6 years ago lol and have not really worked with these specifics in a long while. For my use i just needed to know the inheritance patterns for certain clinical disease - although this sounds super familiar lol, thank you!

[frigid blade]

I found a short paper on this...so interesting! thanks for the information 🙂 https://www.nature.com/articles/46466

[vestal grove]

thank you too, this help me so much :))

[pulsar tapir]

does anyone know how to do this?

[prime junco]

If it's sound familiar for you too, it may be right ! How lucky you are to not have to study anymore cell physiology

[prime junco]

Thanks for this paper i'll give a look later !

[prime junco]

I hope it's make sense for you, otherwise, tell me !

[pseudo moat]

LOL i loved it, it was so incredibly fascinating to lean how complex something is that on the surface was so so simple...its beautiful tbh, its why i majored in both molecular cell physiology and chemistry. It just that what i do know uses these concepts on a very surface level so a lot of the little tiny details like that go un-visited for long stretches of time. Its why i like forums like these, it helps me recall a lot of these things

[prime junco]

Yeah it's fascinating but also incredible frustating. We know how a lot of things work, but we can not figure it why does it work like that ( + there is too much to learn )

[fading mango]

Anyone know a good source on the history behind the search for the mechanism of the chemical origins of life? I have a project to write and I need help structuring it

The topic is the chemical origins of life

It's a 12th grade chemistry project

I'm looking into things like the RNA world theory, ribosomal origin theory, proto-RNA theory, etc

It needs to be 40 pages at least though, so I'm not sure how to structure it

[willow lion]

How does one calculate a new molar concentration from adding 1 solution of a different concentration to another solution of another concentration?

[ashen marsh]

Fu, I have some really good sauce but it is in czech, soo.

[fading mango]

Oh that's alright, I can use Google translate, it can translate entire webpages

Wonders of the internet huh

[frigid blade]

Is this helpful? or you already know this

[willow lion]

so its just dilution?

I thought it was different like for example.
final concentration of CaCl2 when 25cm^3 of 0.4M CaCl2 is added to 50cm^3 of 1.2M CaCl2

[ashen marsh]

Google translate does not do science very well. But what do I know, I used it to translate a german research paper from 1918 and I was sort of ok.

[fading mango]

Hah yeah I know, but it's worth a shot anyway... What's the link?

[frigid blade]

Oh no then its not this formula..its a bit more complicated...gimme a sec

[willow lion]

Thank you

[frigid blade]

soo in your case should be around 0.93

[willow lion]

so concentration of solution 1 + concentration of solution 2 divided by combined volume

[blissful parcel]

Basically conserving moles

[frigid blade]

molarity multiplied with the volume

[willow lion]

thanks a ton @frigid blade

this cleared up a lot of confusions I had

[frigid blade]

and consider its something between 0.4 and 1.2 -> tending to 1.2 because to you take double of that

[willow lion]

👍

[prime junco]

Did you check on google scholor, ncbi or pubmed ?

[fading mango]

Yep I'm doing my reading, but most papers talk about specific theories and aspects... I am looking for a slightly broader source that can give me a coherent structure to all this information

I essentially need help creating an outline

[pseudo moat]

jeez, what possessed u to approach a topic like this for your paper???

[fading mango]

Well it seemed interesting to me as a PCMB student and I'm following a broader theme of entropy and complexity across all my science projects actually

So it fit in well

Also it's particularly interesting cuz it is still in the realm of theory and there are hypotheses still being proposed

A cutting edge of research if you will

[pseudo moat]

i can see that, just with a topic like this please be wary not to fall trapped into the left side of the dunning-kruger effect...

[fading mango]

And what would that be?

[pseudo moat]

simply put, realize that sometimes you might not know, what you might not know in a particular topic. If you dont realize that you delude yourself with a false set of expertise on a subject...then u find urself in hot water...

approach this massive topic humbly and u will do great, approach it with arrogance and it wont end well lol

[fading mango]

I'm afraid I'm already at the bottom of the curve... But not because of lack of expertise but more the lack of understanding of how to structure all of it in a way that's coherent

I'm confident I could do it if I had more time, but the deadline is stressing me out

[pseudo moat]

The bottom is where u should be, it means u are mature about the topic. Being on the left side is where u dont wanna be. If i had better resources i would shoot them your way, im sorry i dont though...however, there are some theories out there regarding irreducible complexity that touch on this topic, but its very controversial

[fading mango]

Yeah, I'm approaching this from a "I don't know anything about this rn and want to learn" perspective, but the problem is I tend to go extremely deep into the research and easily get lost in all the data and theories that I can no longer make sense of the bigger picture... Which is why I want to keep the outline in mind before I go any further

[fading mango]

Controversial is great! I'm really enjoying reading all the lively scientific debate around this whole topic and the agreements and disagreements between various researchers. It's a part of why this is interesting

I'll look into it, thanks

[zealous mortar]

Hey can someone help me with some chemistry, there are only 10

[cunning crescent]

only 10 what?

[zealous mortar]

There are 10 exercises of quantum numbers, I tried to do them but they went wrong

[cunning crescent]

Like orbitals? i might be able to help, but cant promise anything

[zealous mortar]

yeah but i speak spanish

and the exercises are in Spanish, but can you translate them?

[cunning crescent]

well then I am no good hahah good luck

[zealous mortar]

i am peruvian

[cunning crescent]

unless you can translate for me

[zealous mortar]

ohh yeah

i can practice me english xD

[rustic ermine]

Hey

[blissful harness]

this is from my biopsych class: Do you think consciousness is fundamentally component-dominant or interaction-dominant? Support your opinion with your own logic or observations. Could a system made of something other than neurons generate conscious awareness?

I'd argue that consciousness and higher order though that makes up the human experience is interaction dominant, but don't quite know how to answer the second question. .. I think you could replicate the brain on a computer but it's not the same as generating a conscious awareness right? (though neurons ct similarly to 1 and 0s)

[tropic rock]

Does someone know about bacterial transformation?

[frigid blade]

Yees, something specific you wanna know?

[last aspen]

whatever they call, AI, ML or other buzzwords, its not the way a brain actually works

[tawdry crescent]

Can anyone please connect me to a professor of Any prestigious institute of Sciences, I am looking for an intern research position for my college application. Anyone who is already in College and can connect me to Professors of Human Biology or any including Chemistry. It will be a great helpraised_hands

[unreal dirge]

Hello 👋 I am preparing to take Physics 1 (algebra based) in a month. It has been many years since I've taken any math courses. What math topics do you suggest I relearn ahead of the class? I plan on using Khan Academy. Thanks!

[merry raven]

Hi, as long as you can understand the essentials of algebra, you should be pretty good. Depending on the complexity of your course, I would even suggest learning how vectors work

[lusty pine]

Can anybody confirm the answer.
I am getting b, but its given a

[thorny gyro]

It should be b

cant be a

[lusty pine]

thanks :))

[blissful parcel]

Is it 0.5 or 0.6?

[thorny gyro]

for g = 10 m/s^2 it is 1

[blissful parcel]

Yes if that height from bottom is 0.5 , then yes answer should be 1

[thorny gyro]

Can someone please help me with this question.

[thorny gyro]

Lmaaaao just came across this. I’ve seen so many videos of doctors using the DK graph relating to chiropractors and antivaxxers 😆

[lofty dragon]

I ha8 kinematics but ill give it a go

[unreal ridge]

Can someone give me a brief about Oxidation Numbers

[pearl pier]

does anyone know mysql?

[thorny gyro]

#tech-related-help

[paper roost]

Optics question: why can’t we obtain a telescope by inverting a microscope?

[eternal hound]

Is somebody German who can help me with physics
on the subject of mechanics?

[peak geyser]

what is the most effective way to learn organic chem?

[abstract venture]

I found that the most effective way is to do as many practice problems as you can. You can find many problems with solutions online.

[peak geyser]

but the concept it self is a nightmare

[willow lion]

How do you calculate dilution factor?

[abstract venture]

True that

[proven shuttle]

Hellooo. I have a question,
How are body fluids regulations and nervous control in animals related to each other?

[pale bison]

which animals?

I study invertebrate animals, maybe I can help

[willow lion]

Whoever is doing IB chemistry, do we need to know all the exceptions for oxidation states?

Also

How do you calculate dilution factor?

[proven shuttle]

It doesn't say what but I guess they're talking about all animals?

[pale bison]

try to ask in #medic-help too

[thorny gyro]

is the value of molar mass of a compound and molecular weight of a compound same?

[distant glacier]

is anyone here good at organic chemistry

if so plz hit me up

[blissful parcel]

No, molar mass is the weight of one Mole of a molecule , while molecular weight is the weight of one molecule ( which is in order of amu)

For eg molar mass of H20 is 18g , but molecular weight would be 18g/avagadro number

[thorny gyro]

Ohk thanks @blissful parcel again 😅

[blissful parcel]

Np

[silent sundial]

Anyone good at organic?

[verbal flume]

Hi, my exercise is asking for the enthalpy change and I already calculated using Hf but the problem is my exercise have:standard vaporizing enthalpy is +28.8 kJ / mol so I don't know what to use this data for, could anyone help me

[surreal shore]

probably it wanted you to sum up the standard enthalpies for each compound (the vaporizing included) then subtract the products sum from the reagents

[cunning crescent]

Is anyone here good at mass spectrometry/Fragmentation patterns?

[twilit rampart]

yoo, does anyone have the pdf of sn sanyal (organic chemistry)?

[warm chasm]

I need help with college gen chem 2! Please dm me if you can help! Thank you 🙂

[cunning ore]

what's covered in gen chem 2?

[warm chasm]

These are all the chapters covered! @cunning ore

[balmy flame]

Does anyone know how to calculate this?

[lean kraken]

Density is mass divided by volume , but u have to convert the cubic inches to cubic meters. 1.28kg ÷ 0.0001639 m³ = 7.8x10³ (d)

[thorny gyro]

Anyone here study medicine or any related degrees?

need resources to help writing critical analysis essays

[slate terrace]

anyone knows german(cause i cant explain the task in english cuz its chemistry) and knows chemistry? Its something simple rlly but somehow it wont work lol

[cunning ore]

im taking chem idk if i can help i can try or we can discuss if u want

[warm chasm]

@cunning ore I can send you one of the questions I’m struggling with! I couldn’t hurt to try

[shy igloo]

does someone have notes for digital electronics?

[supple whale]

Any 92 plzz

Any1*

[nocturne acorn]

how can i say this to be more specific? and not just restating the question

[supple whale]

Bonds break,energy is released and that energy is used to form new bonds

[lethal reef]

its a big question dude, i solved it but the solution is a bit big

n answer's kinda doubtful

this is what i got

[sand pond]

Correct

[fierce plume]

Una bola metálica de 100 g de masa con una carga eléctrica de -5μC cuelga
verticalmente de un hilo de seda sujetado al techo. Cuando se le aplica un campo eléctrico
uniforme y horizontal de módulo E = 2 · 105N / C y sentido como en la figura, la bola se desvía
de la vertical hasta alcanzar una nueva posición de equilibrio. En esta situación,
a) ¿Cuál de las dos posiciones representadas con línea de puntos en la figura será la
de equilibrio? Haga un esquema de las fuerzas que actúan sobre la bola.
b) Determinar el ángulo que forma el hijo con la vertical.
c) Calcular la tensión del hilo en la posición de equilibrio

A metal ball of mass 100 g with an electric charge of -5μC hangs
vertically from a silk thread attached to the ceiling. When an electric field is applied to it
uniform and horizontal modulus E = 2 · 105N / C and direction as in the figure, the ball deflects
from the vertical until a new equilibrium position is reached. In this situation,
a) Which of the two positions represented by the dotted line in the figure will be the
of balance? Make a diagram of the forces acting on the ball.
b) Determine the angle that the son makes with the vertical.
c) Calculate the thread tension in the equilibrium position

[thorny gyro]

well, you've 3 forces acting on the ball;Mg ,qE and Tension.

[blazing copper]

(chem question) hey im just wondering if someone can explain hwo 1 set of reactants cna have multiple products and how you'd make them. my guess is something to do with energy

[spice lynx]

how many single covalent bonds in HCN

[tulip estuary]

Can someone pretty please explain to me the relationship on how to extinguish between polar and non polar molecules

(chem question) ^ reply to me if possible

[willow lion]

If you want to find out through calculating then 0-0.4 electronegativity difference is nonpolar covalent and polar covalent is 0.4-0.17

anything that has a partial delta + or delta - charge is polar

[willow lion]

there is only 1 single covalent bond

and the lewis structure looks like this

[spice lynx]

what about double bonds

nvm

theres 0 lmao

[willow lion]

there isn't a double bond since the octet rule

all of them want 8 electrons (with the exception of Hydrogen which is fine with 2)

[spice lynx]

oh right thanks

[willow lion]

@tulip estuary

[tulip estuary]

@willow lion thanks

[sweet vapor]

Hi can anybody explain why an increase in the length of a wire will decrease the rate of flow of charges through it?

[thorny gyro]

If we are talking about a cylinderical wire here then an increase in length would result in a decrease in cross-sectional area. Assuming that the current density stays constant(Which it will because the density of the material won't change).The result would be a decrease in current. ( I = dq/dt = n×v×A×q)

I = nvAq

Where n is the charge density

V is the drift velocity of the charges

A is the crossectional area

Q is the amount of charge on 1 particle.

does anyone know what this could be

[sweet vapor]

Ahh alright that clears things up alot. Thanks!!

[distant glacier]

anyone here know organic chemistry?

plz dm me

[crystal sinew]

what exactly do u need?

[balmy flame]

Hi can anyone help with this question. I know the equation of conservation of energy is KE_1 + PE_1 = KE_2 + PE_2

[thorny gyro]

A lemon red car, with a mass of 1000 kg, moves on a horizontal circular track with a radius of 60 m. Starting from rest, the car accelerates at 4.5 m / s ^ 2 tangent to its circular path. The coefficient of static friction between the tires and the road is: 0.9.
Find out how far the car has traveled before it starts to skid

For example this I can’t seem to understand how to do it :/

[blazing fossil]

yeah seems weird

but I think I get it now

you know there will be a centripetal acceleration to keep it in the circular path? @thorny gyro

[thorny gyro]

Yes

[blazing fossil]

well, the faster it travels around that circle, the stronger that centripetal force will become, you have that equation?

I think it's this one

[thorny gyro]

Yeah

[blazing fossil]

you know how to add accelerations that are perpendicular from each other?

[thorny gyro]

No😭

[blazing fossil]

well... for now I am helping you understand it conceptually, okay?

[thorny gyro]

Do you mean like when we take the y and. x of each forces then do the sum of each separately?

[thorny gyro]

Yes

[viral sorrel]

yeah basically

they're vectors

[thorny gyro]

Oh okay so yeah ik how to do it

[blazing fossil]

wait... my brother just called

[thorny gyro]

Okii

[blazing fossil]

I might have to talk to him for an hour or so

[thorny gyro]

It’s fine

[blazing fossil]

I'm back!

so, I'll continue explaining for when you come back

[thorny gyro]

I’m here

[blazing fossil]

yes!

but in this case... that might not cut it

[thorny gyro]

Actually what do I need to find in order to know how much the car travelled?

[blazing fossil]

since you are more comfortable with forces than accelerations, we multiply the accelerations by their mass to calculate both forces (the tangential in the direction of movement along the circle, and the centripetal force, towards the center of the circle)

[blazing fossil]

what you need to find is when the sum of these forces I just mentioned (which is not a simple addition but a vector addition) equals the normal force that you calculate with the coefficient of static friction

[blazing fossil]

as the velocity around the circle grows, so does the centripetal force, so, any moment later the total force on the car will overcome the normal force calculated with the coefficient of static friction

then you can use that time

to calculate the distance it traveled

it's a long problem

if you are wondering why...

it's related to these kind of problems... in which the object requires a minimum force to break the static frictional force

in this case of the wheels

which are "rolling" but not really skidding

[thorny gyro]

I’m a bit lost
Which accelerations

[blazing fossil]

the problem gives you one right away

"the car accelerates at 4.5 m / s ^ 2 tangent to its circular path"

the other is the force that makes the car turn so it doesn't just leave the circle in a tangential line

the centripetal force

[blazing fossil]

acceleration* well you know that since the mass is constant, force and acceleration are equivalent when you multiply the acceleration by the mass of the object you get the force

[thorny gyro]

Oh okayy

I’ll try to do it and if I can’t I’ll ask you about the part I don’t understand, if u don’t mind

[blazing fossil]

go ahead

but yeah

sorry this problem does have way too many components that I didn't know you might be struggling with

if you don't mind

you might benefit from solving simpler problems that use the concepts that this problem uses

just a few of them *

[thorny gyro]

Oki and Tysm for ur help❤️

[blazing fossil]

you are welcome

[silk sparrow]

Hi... what is the meaning of novel reactor?

[unborn bluff]

Kind of confused

Stoichiometry be like

[abstract venture]

I calculated it this way

[unborn bluff]

Thank you!

I got 225 L did I do it right

[abstract venture]

I forgot to take into account that there is 2 on Na and only 1 of H2, so there is a difference when calculating n(H2), sorry it was my mistake. But this time I think it is correct

[abstract venture]

I have calculated it this way, how did you get your answer?

[balmy flame]

Hi can someone check if what I am doing is correct for this one please? I got a) 8.6

My work

[tough coral]

this is physics ,, how do i answer this?

[thorny gyro]

I am crappy in physics but I’ll attempt. I’d say yes cause one throws the ball at a given force. The catcher’s hand should be able to produce an opposite equal force to be able to stop the ball. Otherwise, the person wouldn’t be able to catch the ball. For example, if u attempt to catch the ball with a relaxed hand, it’s ur hand who will get pushed out of the way of the ball cause it’s opposite force would be way smaller than the ball’s force.
Take it as:
Catcher’s force=-2. Thrower’s force=3
3-2=1, won’t catch the ball❌, but if
Catchers force=-2. Thrower’s force=2
2-2=0. Catches ball✅
So yes the two forces should be of equal amount

Well that’s how I see it, not sure tho🙄some things seem logical to me but nope they ain’t right :/

Consider the system consisting of a beam, mass 100 kg and measuring 10 m, from which our multicultural friend, Justin (a mass of 60 kg) hangs. The whole is held by a rope hanging on the wall.

a) Determine the minimum tension that must be able to withstand the rope to balance the system.
b) What then is the force applied by the pivot A on the beam?

Can anyone help me even tho it’s a long problem? :/

[stone pecan]

its just a simple triangle of forces; draw it and you will be able to determine the force for the rope and for the pivot.

[tough coral]

OHHHHH ok ok i get it now

makes a lot of sense w an explanation :,)

thank you!!

[thorny gyro]

Welcome hun

[thorny gyro]

I was able to do it hehehe yayyy

[thorny gyro]

Man it was long as heck but thank youu I managed to solve it

[stone pecan]

awesome! :) 💯

[thorny gyro]

no they are not action reaction force pairs.

[tough coral]

h how so?

[thorny gyro]

well a sec

when the person "A "throws the ball with a force Fab, the ball exerts an equal and opposite force Fba on the hand (These two forces are equal in magnitude and opposite in direction, but they act on two different bodies[Action - reaction force pairs])

same for the force exerted by the person "c"

action reaction force pairs act on two different bodies in the opposite direction.

the forces Fab and Fcb act on the same body

though they are equal in magnitude, they are not opposite in direction.The angle b/w them depends on the the angle Fab makes with the horizontal ground.

hence, they are not Action reaction force pairs.

@tough coral @thorny gyro

[thorny gyro]

Fab acts on the ball tho, no?

yeah

[tough coral]

OHHH

[thorny gyro]

It’s no the same body

[tough coral]

wait wait force pairs are like collision then?

[thorny gyro]

yeah

[thorny gyro]

?

Fab acts on the ball, Fcb acts on the hand, it’s two different bodies👁👄👁 man physics got me confused as hell

[thorny gyro]

who said fcb acts on the hand?

Fba mbd

[thorny gyro]

Newton's third law.

[tough coral]

what sort of pair would they be then?

[thorny gyro]

none, they are just equal in magnitude.

[tough coral]

ohhh

i see i see

thank you!!!

[thorny gyro]

np

Oh I was explaining the wrong Newton’s law oops

Tyy

[rugged apex]

solve this plese

[blissful parcel]

A&B?

Vont hoff factor wil be same

@rugged apex

[rugged apex]

i dont know man

in solutions it is a b d

[mortal olive]

does anyone know the answer for this?

i cant google it because its an image

and this information is comepletely irrelevant to my course anyway, but its still here for revision

[viral sorrel]

reverse research is a thing you can do

also this seems like an exam question

rule #5

[dull zealot]

can someone help with #3?

[blazing fossil]

yeey!

[frail gazelle]

ooo i think it's ernest rutherford but take with a grain of salt

[supple spruce]

I think it's bohr

[rose spruce]

yes it's bohr, the fixed orbit distances are symbolic of quantisation arising from quantum mechanics

[thorny gyro]

idk if i can or cannot speak turkish here but
bir karakter bakımından heterozigot genotipli bireyler niye iki çeşit gamet oluşturuyor? AaBbxAaBb şeklinde olmuyor mu?

[quiet sorrel]

umm i dunno lol senin yazdığın 2 karakter bakımından heterozigot eğer 1 karakter bakımından olmasını istiyorsan sadece A ya da B gibi olmalı yani Aa

yani Aa ya da Bb gibi

[thorny gyro]

hmm anladım sanırım kafam karışmıştı teşekkür ederim <33

[quiet sorrel]

rica ederimm

[blissful parcel]

Well what I did was

∆Tb = Kb × Molality × vont hoff factor , vonthoff factor is same for option A and B , so ∆Tb should be same for both

I think the given answer is wrong

[viral sorrel]

actually the answer was Rutherford, the Bohr model is represented differently

[viral sorrel]

yeah, waht the image depicts seems like the planet model

which was ritherford's

bohr model is represented with orbitals

[rose spruce]

no it's not haha

[viral sorrel]

hm, yes can you see the difference between enrgy levels in this picture?

the answer is no

because it's not Bohr model

[leaden mason]

rutherford suggested a very basic model of a central positive nucleus and negative particles surrounding it. however you are right in saying bohr developed the idea of the difference in energy of electron orbitals. I think the answer for the question is Bohr but if the 'correct' answer was rutherford, i wouldn't be surprised

[rose spruce]

the image is not a scientific representation of an atom in the first place (which in my opinion makes it a bad question) but rutherford did not suggest electrons orbiting in rings, this image arises from bohr's interpretation

[leaden mason]

its quite an ambiguous question though

[rose spruce]

agreed

[leaden mason]

i think the person who wrote it had a specific set of parameters for each model in mind meaning its however they interpret it

so if its youre teacher, tell them to give you more info next time which could help to properly define an answer

hope that help

helps

[blazing copper]

not on the test btw

[mortal olive]

oh woah thank you for all the help

im not gonna ping anyone but thanks very much if u see this

ill post the correct answer in response when i get it

[rugged apex]

well u were right my lecturer told it was a key mistake

thank you

[blissful parcel]

Np

[blazing copper]

can someone gime some ttips on figuring out if a compound is a gas

just by looking at it

if there are any naming conventions used or wtv

cus ik co2 is gas and so is h2 and wtv but how am i meant to know that without knowing it from the start

[little fog]

Not really sure what you mean by naming conventions

sometime (g) is used next to a compound to denote that it is a gas

e.g. CO2(g)

[soft kite]

There aren't any as far as I'm aware. You can usually just get a feel for what would be gaseous under standard conditions

like, if they're described as metals in the periodic table, they probably aren't gaseous for the problems your grade level solves

[soft cypress]

I dont know if this is true but in my high school I thought if they are on the right side of the periodic table they're likely to be gaseous. Hit me if I'm wrong.

[ashen lichen]

I think so too.. I thought metals were on the left and nonmetals are on the right. Then again could be wrong, I hate chemistry 😅

[soft cypress]

I hate chemistry, I love maths and physics and I'm a medic now.

Metals shouldn’t fly

[blissful parcel]

[blissful parcel]

F

[soft kite]

Yep that's true! Everything in the noble gases column, plus the elements that exist as diatomic molecules are pretty much just what you need

these are the diatomics, found this funny mnemonic when i googled lol

[ashen lichen]

OH MY GOD THIS IS SO HELPFUL WTH ^

HOW DID I NOT KNOW THIS IN MY 2 YEARS OF HIGH SCHOOL CHEM

Tysm 😭

[soft kite]

Good luck! :)

[thorny gyro]

can someone help me with this question?

Calculate the number of moles of Ca, C and
oxygen atoms in 200g of CaCO3.
(Molecular Mass of CaCO3 = 100)

[blissful parcel]

Hm

[blissful parcel]

Can you tell me number of moles of oxygen in 1 mole of caco3?

Just by looking at the molecular formula

[thorny gyro]

omg u again 😂

3 moles

[blissful parcel]

Yes

What about carbon?

[thorny gyro]

1

[blissful parcel]

And it's same for ca right

[thorny gyro]

yep

[blissful parcel]

Now what is the number of moles of caco3?

[thorny gyro]

umm

2

[blissful parcel]

Yep

[thorny gyro]

oh wait so that's it?

[blissful parcel]

So if one Mole of caco3 contains 3 moles of oxygen atoms then , how much will 2 moles contain?

[thorny gyro]

6

[blissful parcel]

Yep , same for calcium and carbon

[thorny gyro]

and Ca and C will contain 2?

[blissful parcel]

Yes

[thorny gyro]

oh

Thanks!

[blissful parcel]

Np

[thorny gyro]

One more question:

Cost of table salt (NaCl) and table sugar
(C12H22O11 ) is Rs 10 and Rs 40 per kg. Find the
cost of the salt and sugar per mole.

Ah it's kinda weird

[blissful parcel]

Hm

Sucrose is 40/kg

40×1000/molar mass (which is in grams) = number of moles

[thorny gyro]

Oh wait, do we take mass as 1000 g?

ohh I figured it out

thanks btw!

[blissful parcel]

Np

[thorny gyro]

I really need to try my hardest before I go on asking a question here hahaha

A good rule is to struggle with a question for at least 10 - 15 minutes before you ask for help

[blissful parcel]

Well once I solved a question after 1.5 hrs , it works that way too sometimes xD

[thorny gyro]

Hahah yeah

Finding the solution yourself would be best

But you have to at least work on it yourself for a bit before you ask for help

[blissful parcel]

Yes , the satisfaction after that is on another level

[thorny gyro]

Otherwise you will be less likely to internalize the solution

[thorny gyro]

Hahaha definitely

It took me 4 years to finally pass my Advanced Business Economics

It felt like finally slaying my moby dick

[blissful parcel]

Oh nais

[thorny gyro]

u guys are so helpfullll can anyone explain why Helium is in the noble gases column if it’s not a noble gas? i’m mapping electron configurations and it makes almost perfect sense... except for there being 2 electrons in the 1s orbital. why does Helium have to be moved next to Hydrogen in the s orbital section? i mean that part makes sense but why isn’t the periodic table laid out like that in the first place?

im sorry this is prob a really dumb question

[blissful parcel]

Well helium is a noble gas

[thorny gyro]

The K shell is complete

[thorny gyro]

k

(sorry, couldn't resist)

[soft kite]

you probably just looked at something wrong hahaha

[blissful parcel]

Well I think my statement is not needed anymore lol

[thorny gyro]

aww I thought u were giving a full detailed explanation covering all the topics which I probably can't comprehend rn xD

[blissful parcel]

Nah , I just did something like that in general chat , and was ignored, it's best to only say in limit :)

Well I think ,it was unnecessary too xD

[thorny gyro]

Ah I see

[thorny gyro]

ty guys, i wasn't using my brain cells i really appreciate the help

Hola

[atomic quiver]

Can I have some help understanding Pleiotropy in genetics? Its the one thing I don't understand that well.

Who ever helps me gets a spot on my show

[pale bison]

You basically have a gene that influence different type of aspect. He maybe produce just a hormone or influence just 1 thing but that thing or that hormone has different conseguenses

Sorry for the grammar but I’m a bit tired

Let me find you a easy example

[atomic quiver]

So an example of that would be like if someone had a gene for red hair, that gene would also express freckles?

So one gene determines multiple traits

[pale bison]

Yes, but you can have freckles without having red hair. So that gene not directly cause freckles

[atomic quiver]

Okay that makes a bit more sense. I also found that the suffix pleo-, means more.

[atomic quiver]

I appreciate it Cauli. You can now be part of the Ellen Show

[pale bison]

I’m trying to find an entire example

@atomic quiver I hope this could help more

[atomic quiver]

Yeah, this is part of my textbook

But it makes more sense when you can see the genotypes

[pale bison]

If you need another example I can search

[pale bison]

I want to be near the hot guys 😂

[atomic quiver]

Noted 😆

[spring tide]

guys

can anyone help me with quantum mechanics?

[fringe venture]

does anyone have any tips on how to prepare before AP Chem?

[sly pollen]

can someone (preferably who knows some spanish) help me with chemistry pls? i recently started college and dont understand much (its some basic stuff really for someone who knows a bit)

[thorny gyro]

I’d try to help, I am not Spanish doe

[sly pollen]

where do i join then?

[thorny gyro]

Just send the exercise here

[sly pollen]

i´ll try my best to translate my docs

its more of a refresh

than some ejercise

[thorny gyro]

Ehhh I’m to crappy in chem to do a refresh I’m flunking😭

[sly pollen]

also idk who to translate some of the stuff xd

i mean, everything is in spanish

[thorny gyro]

What’s the subjects doe